%0 conference lecture %@ %A Ulbricht, M.,Oechel, A.,Schulze, H.,Lehmann, C.,Hicke, H.-G.,Tomaschewski, G. %D 1993 %J ICOM '93: The 1993 International Congress on Membranes and Membrane Processes %N %P %T Chemical modification of polyacrylonitrile ultrafiltration membranes for enzyme immobilization %U %X